Daniel Rice wrote: > We have to build our own because we do a lot of custom stuff in our driver > specific to our products. In MANY cases, it is much more expedient to implement something like this by writing upper and/or lower filter drivers to usbaudio.sys. That way, you aren't trying to recreate the 12 years of development and testing in the existing usbaudio.sys driver. I've worked on 4 or 5 projects that implemented usbaudio filter drivers to implement custom functionality. -- Tim Roberts, timr@xxxxxxxxx Providenza & Boekelheide, Inc. ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/